CHEMICAL ENGINEERING JOURNAL
·
2024
·
IF 13.3
Haichuan He,Xiao Yu,Wei Wang,Liu Deng,Hao Zeng,Liqiang Wang,Ke Zeng,Jianhan Huang,Minghui Yang,You-Nian Liu
Bismuth-based materials have emerged as promising electrocatalysts for the electrochemical reduction of carbon dioxide (eCO 2 RR) to HCOOH. However, it remains challenges to meet the practical application requirements and identify the active sites of bismuth-based catalysts in eCO 2 RR. Herein, bismuthate (MBi 2 O 4 , M = Ca, Cu, Zn) derived nanosheet-like electrocatalysts with metal-modified edge defects are developed. During electrochemical processes, MBi 2 O 4 pre-catalyst undergoes surface reconstruction to expose more active Bi 0 sites and to form abundant metal-modified edge defects, which facilitate the modulation of charge state of adjacent Bi sites and improve the adsorption of *OCHO intermediate, thereby enhancing the selectivity of eCO 2 RR towards HCOOH. The Ca-modified defect-rich Bi catalyst exhibits a maximum HCOOH Faradaic efficiency of 94.3 % at an industrially relevant current density of 400 mA cm −2 , together with high stability/reproducibility of 55 h. This work proposes a new strategy for construction of Bi-based catalysts and explores its structural reconstruction mechanism during the electrocatalytic process, opening a new window for design of eCO 2 RR catalysts.
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PHARMACEUTICAL DEVELOPMENT AND TECHNOLOGY
·
2024
·
IF 2.6
Yun Meng,Ye Cai,Mengyao Cui,Yuhang Xu,Long Wu,Xiang Li,Xiaoqin Chu
The aim of this study was to prepare a solid self-microemulsifying drug delivery system (S-SMEDDS) of cinnamaldehyde (CA) by spray drying technique to improve the oral bioavailability of CA. The preparation of CA S-SMEDDS with maltodextrin as the solid carrier, a core-wall material mass ratio of 1:1, a solid content of 20% (w/v), an inlet air temperature of 150 °C, an injection speed of 5.2 mL/min, and an atomization pressure of 0.1 MPa was determined by using the encapsulation rate as the index of investigation. Differential scanning calorimetry (DSC) revealed the possibility of CA being encapsulated in S-SMEDDS in an amorphous form. The in-vitro release showed that the total amount of CA released by S-SMEDDS was approximately 1.3 times higher than that of the CA suspension. Pharmacokinetic results showed that the relative oral bioavailability of CA S-SMEDDS was also increased to 1.6-fold compared to CA suspension. Additionally, we explored the mechanism of CA uptake and transport of lipid-soluble drugs CA by S-SMEDDS in a Caco-2/HT29 cell co-culture system for the first time. The results showed that CA S-SMEDDS uptake on the co-culture model was mainly an energy-dependent endocytosis mechanism, including lattice protein-mediated endocytosis and vesicle-mediated endocytosis. Transport experiments showed that CA S-SMEDDS significantly increased the permeability of CA in this model. These findings suggested that CA S-SMEDDS is an effective oral solid dosage form for increasing the oral bioavailability of lipid-soluble drug CA.
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DOI
PubMed
高影响因子
CHEMICAL ENGINEERING JOURNAL
·
2025
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IF 13.2
Shuangchun Jiang,He Tao,Yingjuan Shao,Yao Fu,Wenqi Zhong
The pressurization can significantly enhance the thermochemical energy storage performance of Ca-based materials. In this study, detailed experimental investigations were conducted in both fixed bed and fluidized bed on the performance of TiO 2 modified Ca-based materials ranged from 700 °C to 900 °C under pressurized conditions (0.1 MPa to 0.8 MPa) from powder to pellet, including the influence of inert dopants on the properties of CaO powder, the optimization of biomass pore-former agents' selection and the enhancement of pressurized fluidization states on the performance of pelletized materials. The findings indicated that the pressure intensity has a positive correlation with the energy storage density and cyclic stability of TiO 2 modified Ca-based materials. The results demonstrated that the properties of CaO powder intensified with the pressure and the energy storage density was increased by 31.4 % with 5 % TiO 2 doped at 0.8 MPa. And the energy storage performance of the pelletized CaO-5TiO 2 with 10 % bagasse added was also significantly improved at a higher-pressure condition. The energy storage performance of the determined 10B-CaO-5TiO 2 pellet under fluidization conditions at 0.8 MPa was 38.9 % higher than that of atmospheric pressure after 10 cycles. As the carbonation pressure increased, the average grain size of CaO exhibited a decline of 7.0 %, a slighter sintering and deeper reaction region were observed into the determined pellet. Furthermore, the specific surface area and pore volumes of the 10B-CaO-5TiO 2 pellets under high carbonation pressure were 382.8 % and 460.0 % higher than that of atmospheric pressure in the fluidized bed, respectively.
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Science Bulletin
·
2022
·
IF 20.577
Shunshun Zhao,Chuanlin Li,Xixi Zhang,Na Li,Tongkai Wang,Xiaojuan Li,Chenggang Wang,Guangmeng Qu,Xijin Xu
The proposal of hybrid ion batteries, which can integrate the advantages of the single ion battery, opens up a new route for developing high-performance secondary batteries. Herein, we successfully constructed an aqueous hybrid battery comprised of polyanionic-type cathode material (Na 3 V 2 (PO 4 ) 3 , NVP), Zn metal anode, and aqueous Ca 2+ /Zn 2+ hybrid electrolyte. This exciting combination gives full play to not only the excellent diffusion dynamics of Ca 2+ in the NASICON (sodium super ion conductors) structure but also the electrostatic shielding effect of Ca 2+ with low reduction potential that inhibits the formation of zinc dendrites. As results, the NVP//Zn Zn/Ca hybrid battery delivers favorable specific capacity with outstanding rate performance (85.3 mAh g −1 capacity at 1 C, 60.5 mAh g −1 capacity at 20 C), and excellent cycle stability (74 % capacity retention after 1300 cycles).
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ACS Catalysis
·
2025
·
IF 13.1
Jia Wang,Wen-Cui Li,Andi Di,Li-Dong Zhao,Danhui Sun,Lei He,An-Hui Lu
Ethanol upgrading to C6–12 alcohols offers a green pathway to high-valued chemicals. Achieving high yields of C6–12 alcohols remains challenging due to the complexity of the ethanol reaction network. Here, we report an efficient conversion of ethanol to C6–12 alcohols using Ca-deficient mesoporous hydroxyapatite as the catalyst, which was prepared from the reaction of NH3 and PO43–. The yield of C6–12 alcohols reached 34.5% with a selectivity of 59.3% at 325 °C and 0.1 MPa, exhibiting a high ethanol upgrading performance. Ethanol adsorption kinetics and ethanol-TPD-DRIFT results revealed that the ethanol diffusional time constant of the enlarged pore of the hydroxyapatite increased by 2.01 folds of the original hydroxyapatite, thereby facilitating the access of ethanol molecules to active sites, which was beneficial for ethanol dehydrogenation. The online-generated acetaldehyde was subsequently undergoing aldol condensation to accelerate the formation of C4 aldehydes, which, as the intermediates, were stabilized over Ca deficiency sites on the hydroxyapatite surface. The enriched C4 aldehyde intermediates are further coupled with C2, C4, or C6 aldehydes at the basic sites to produce longer-chain aldehydes (C ≥ 6), which are subsequently hydrogenated to form C6–12 alcohols. Noticeably, compared to the original hydroxyapatite, the Ca-deficient hydroxyapatite showed enhanced density of basic sites, about two times higher. Hence, this catalyst remarkably boosted the yield of C6–12 alcohols from ethanol upgrading. This work provides a strategy for the selective conversion of ethanol to C6–12 alcohols.
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COLLOIDS AND SURFACES A-PHYSICOCHEMICAL AND ENGINEERING ASPECTS
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2025
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IF 5.4
Haoyang Xu,Jiawen Zhang,Yifan Cheng,Yang Wang,Xuen Guo,Zhiqiang Zhang,Chaoqun Mu,Zhixian He,Juanqin Xue,Liang Zhang
A novel photocatalytic material, TiO 2 /STW-zeotype germanosilicate (GeSi-STW)/cellulose acetate (CA), has been successfully synthesized. During a 60 min photocatalytic degradation of tetracycline (TC), TiO 2 /GeSi-STW exhibited a rate constant of 0.02162 min −1 , which was notably higher than the values observed for pure TiO 2 (0.01373 min −1 ) and GeSi-STW (0.00277 min −1 ). SEM studies indicate that GeSi-STW serves as a support for TiO 2 , with TiO 2 being widely distributed on the surface of GeSi-STW. UV–vis DRS studies show that the introduction of GeSi-STW improves the low visible light absorption issue of TiO 2 . As revealed by PL and theoretical calculation outcomes, the combination of TiO 2 and GeSi-STW is capable of improving the situation where photogenerated carriers in the material tend to recombine easily. TiO 2 /GeSi-STW was successfully loaded onto CA, and TiO 2 /GeSi-STW was widely distributed in the pores of CA, which improved the problems of dispersion and difficulty of recycling of powder catalysts, and promoted the synergistic adsorption/photocatalysis of the material. TiO 2 /GeSi-STW/CA can quickly degrade TC without the need for additional oxidants and retains approximately 95 % of its original efficiency even after 5 cycles of reuse. The findings suggest that TiO 2 /GeSi-STW/CA holds significant potential for application in the treatment of antibiotic-contaminated wastewater.
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JOURNAL OF GEOPHYSICAL RESEARCH-SOLID EARTH
·
2024
·Vol. 129
·期 3
·e2023JB027306
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IF 3.9
Yanyan Zhou,Mingguo Zhai,Ross N. Mitchell,Peter A. Cawood,Guangyu Huang,Christopher J. Spencer,Mimi Chen,Yibing Li,Taiping Zhao,Tengfei Wu
The start of the Paleoproterozoic supercontinent cycle is typically taken as the initiation of orogenesis at ca. 2.1 Ga leading to the assembly of Earth's first supercontinent, Columbia. However, the dearth of ca. 2.5–2.2 Ga geological records makes it difficult to deduce tectonic factors during the onset of the Paleoproterozoic supercontinent cycle. The petrogenesis of tonalite–trondhjemite–granodiorite (TTG) provides useful proxies for tracing prevailing geodynamic regimes of early continental evolution. However, marked decreases of TTG and other magmatism occurred across the Archean–Paleoproterozoic transition and have previously precluded forming testable hypotheses. Early Paleoproterozoic TTGs have been identified in the North China Craton (NCC) and other cratons, which may represent the last major pulse of TTGs globally. Here we present low δ 18 O and δ 30 Si ca. 2.3 Ga TTGs from the NCC, together with thermodynamic modeling and compilation of stable O and Si isotopes for TTGs globally through time. The ca. 2.3 Ga TTGs were derived from the partial melting of Archean basaltic crust and give lighter average zircon δ 18 O (3.15 ± 0.35‰) and whole-rock δ 30 Si values (−0.17 ± 0.08‰) than most Archean TTGs. Considering coeval mafic-felsic igneous rocks, and lithospheric thinning since ca. 2.5 Ga based on estimated crustal thickness through the Neoarchean–Paleoproterozoic, we posit the onset of an intraplate rifting consistent with the anomalous low-δ 18 O magmatism. Continental rifting of Archean cratons/supercratons plausibly hints at the formation of rifts driving subduction initiation as the veritable onset of the Paleoproterozoic supercontinent cycle. Key Points Ca. 2.3 Ga tonalite–trondhjemite–granodiorite (TTG) in the North China Craton (NCC) shows the affinity of low-pressure (LP) TTGs and contains low zircon δ 18 O and bulk-rock δ 30 Si values Ca. 2.3 Ga low δ 18 O and δ 30 Si TTG and coeval low-δ 18 O magmatism herald the initiation of an intraplate rift setting Such intraplate rifting hints at the formation of rifts driving subduction as the real onset of the Paleoproterozoic supercontinent cycle Plain Language Summary The Earth's first supercontinent, Paleoproterozoic–Mesoproterozoic Columbia, likely began to form during ca. 2.1 Ga (billion years ago) orogenesis. However, the limited record of ca. 2.5–2.2 Ga magmatism makes it difficult to establish how exactly the Paleoproterozoic supercontinent cycle commenced. The tonalite–trondhjemite–granodiorite (TTG) series of felsic rocks forms the backbone of Archean cratons and can provide key constraints on the Earth's early tectonic evolution. Some early Paleoproterozoic TTGs occur in North China and other cratons, which may represent the last major TTG event globally, presenting the possibility to fulfill this role. Here we carry out zircon O and bulk-rock Si isotopic analyses and thermodynamic modeling for these ca. 2.3 Ga TTGs, together with Si-O-Hf data compilation of TTGs globally through time. These ca. 2.3 Ga TTGs show lighter zircon O and bulk-rock Si isotopes than those of Archean TTGs. They might be formed within-plate, associated with lithospheric thinning and mantle-crust remelting to form mafic-felsic magmatism. We propose an intraplate rift setting for this early ca. 2.3 Ga magmatism, which drove the mobilism that led to the subsequent 2.1–1.8 Ga orogenesis and should be posited as the real start of the Paleoproterozoic supercontinent cycle.
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JOURNAL OF ALLOYS AND COMPOUNDS
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2025
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IF 6.3
Yaowu Wei,Xiujuan Wang,Yuan Chen,Wenguo Zhang,Junfeng Chen
The effect of Ca(OH) 2 and Zr(OH) 4 on the sintering behavior and thermal shock resistance of Y 2 O 3 ceramics were investigated in this study. The results showed that Ca(OH) 2 enhanced the densification of Y 2 O 3 ceramics. CaO generated from the decomposition of Ca(OH) 2 reacted with Y 2 O 3 to form a solid solution. The substitution of Ca 2 + for Y 3+ created V O ∙ ∙ that facilitated substance migration and pore elimination. Conversely, the introduction of Zr(OH) 4 exerted an adverse effect on the sintering. ZrO 2 produced by the decomposition of Zr(OH) 4 formed a solid solution with Y 2 O 3 which inhibited the sintering of Y 2 O 3 ceramics, where Zr 4+ primarily enhanced lattice stability rather than promoting sintering. The O i ′ ′ created by the substitution of Zr 4+ for Y 3+ reduced cation diffusion and hindered grain boundary migration. The mechanisms by which two types of additives affect the thermal shock stability of Y 2 O 3 ceramics are different. The Zr(OH) 4 -doped ceramics demonstrated better thermal shock resistance owing to their higher porosity, which changed energy release pathway and increased the resistance to crack propagation. In comparison, the improvement in the Ca(OH) 2 -doped ceramics mainly originated from the enhanced mechanical properties, which would suppressed crack initiation and delayed failure under thermal stress.
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PLoS One
·
2024
·Vol. 19
·期 9
·e0308424
·
IF 2.9
Yulin Liu,Longzhan Dong,Wenli Wu,Jiantao Ping,Jingbo Chen,Qiongzheng Hu
Hardness is one of the basic parameters of water, and a high-level hardness of drinking water may be harmful to human health. Thus, it is very important to monitor drinking water hardness. In this work, a portable lateral flow distance-based paper sensor for the semi-quantitative detection of drinking water hardness is demonstrated. In the presence of Ca 2+ /Mg 2+ , the hydrogel can be formed via the chelation between sodium alginate and Ca 2+ /Mg 2+ , inducing a phase separation process. The viscosity change of the sodium alginate solution is directly related to the Ca 2+ /Mg 2+ concentration and can be determined by the water lateral flow distance on test strips. The sensor successfully realizes the quantification of Ca 2+ and Mg 2+ in the range of 0–10 mmol L -1 and 4–20 mmol L -1 , respectively. The recoveries are found varied from 95% to 108.9%. The water hardness is acceptable for drinking if the C r values lies in the range of 0.259 to 0.419, and it is high with the C r value above 0.595. Remarkably, the performance of the sensor is comparable with the commercial kit for real water samples, which avoids the subjective judgment. Overall, this method provides a portable approach for semi-quantitative detection of drinking water hardness with the merits of convenience and low cost, which shows great potential for the potential application.
研究领域:
环境科学
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分析化学
·
水质监测
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Journal of Cleaner Production
·
2025
·
IF 10
Dongyu Chen,Meizhu Chen,Xiangming Zhou,Shouwei Jian,Jianwei Zhang,Xinkui Yang,Yuechao Zhao
Minimizing indoor temperature fluctuations reduces dependence on heating and cooling systems, thereby lowering building energy consumption and carbon emissions and subsequently helping tackle global climate challenges. In this study, phase change capsules (PCCs) based on waste cooking oil derivative, Ca-alginate and nano SiO 2 were developed for foamed concrete (FC). The effects of nano SiO 2 dosage on PCC morphology, durability, thermal stability, and heat storage performance were systematically investigated. The distribution of PCCs within FC and the mechanical and thermal regulation properties of FC containing PCC were evaluated. The experimental results indicate that PCCs with 2 wt% nano SiO 2 exhibit a compressive strength of 26.29 N at 15 °C, the thermal decomposition onset above 200 °C with a notable mass loss of 40 %, and phase change enthalpy and temperature are 68.86 J/g and 20.1 °C, respectively. Ca-alginate/nano SiO 2 PCCs were uniformly dispersed and structurally intact within the FC matrix. Incorporation of 3 wt% Ca-alginate/Nano SiO 2 PCCs led to a 10.8 % reduction in compressive strength while exceeding the minimum strength requirements (>8.13 MPa) and achieving a 3.6 °C reduction in FC temperature variation. This study offers a sustainable strategy for improving building energy efficiency while promoting the recycling of waste cooking oil.
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高影响因子
PROGRESS IN ORGANIC COATINGS
·
2025
·
IF 7.3
Huawei Li,Chen Huang,Mahmoud Farghaly,Dengfeng Kuang,Shibo Yan,Yan Xiao,Xueliang Xiao
This work presents a multifunctional composite film with integrated photothermal and electrothermal conversion, electromagnetic interference (EMI) shielding, and active de-icing capabilities, fabricated via electrospinning combined with layer-by-layer (LbL) self-assembly. Polydopamine (PDA)-modified thermoplastic polyurethane nanofiber membranes (PDA@TPU) served as the substrate. Synergistic interaction with sodium alginate (SA) enabled the layer-by-layer self-assembly of molybdenum disulfide (MoS₂) and carbon nanotubes (CNTs) onto the substrate surface. Subsequent Ca 2+ drop-addition reaction cross-linking ultimately formed a robust and stable coating. The PDA and SA layers significantly enhance interfacial adhesion between the conductive fillers (MoS₂/CNTs) and the polymer matrix, ensuring mechanical durability and efficient thermal conversion. The resulting five-layer film exhibits excellent performance: a photothermal temperature rise of 69.2 °C under 1 sun irradiation (100 mW/cm 2 ), electrothermal heating exceeding 80 °C at 7 V, and an EMI shielding effectiveness of 33.8 dB in the X-band. Notably, this film exhibits outstanding durability, with its electrical conductivity remaining virtually unchanged after repeated washing. Under dual photothermal and electrothermal stimulation (1 sun +7 V), the film can completely melt surface ice within 60 s, effectively preventing electromagnetic shielding efficiency degradation caused by ice accumulation. The layer-by-layer self-assembly technique based on PDA and SA systems offers a novel strategy for fabricating multifunctional composite films with outstanding comprehensive properties, demonstrating broad application prospects.
研究领域:
材料科学
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纳米复合材料
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功能高分子材料
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电磁学
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热管理工程
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高影响因子
CONSTRUCTION AND BUILDING MATERIALS
·
2020
·
IF 4.419
Woo Sung Yum,Jung-Il Suh,Do Hoon Kim,Jae Eun Oh
Recently, the combined use of calcium oxide (CaO) and calcium formate (Ca(HCOO) 2 ) has been proposed as an alternative activator for ground granulated blast furnace slag (GGBFS) (referred to as CaO-Ca(HCOO) 2 -activated GGBFS system). However, this clinker-free binder system produces calcium aluminate hydrate (C 2 AH 8 ), generally leading to the degradation of cementitious binder systems by its conversion to other phases. Thus, in this study, attempts to remove C 2 AH 8 from this system without losing the strength are suggested by the use of two additives (i.e., calcium sulfate (CaSO 4 ) and calcium nitrate (Ca(NO 3 ) 2 ), respectively). Results revealed that the above-mentioned additives completely remove C 2 AH 8 in the initial curing stage via its conversion to ettringite or NO 3 - and NO 2 -AFm, respectively. In addition, the additives reduced the extent of the total shrinkage and the standard deviation of strength results of triplicate samples. However, CaSO 4 exerted a beneficial effect on the strength, while Ca(NO 3 ) 2 exerted a marginal or detrimental effect on the strength. Therefore, this study suggested a new mixture form of an activator, comprising CaO , Ca(HCOO) 2 , and CaSO 4 , to activate GGBFS for maintaining strength without the conversion issue of C 2 AH 8 .
研究领域:
建筑材料学
·
材料科学
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危险品化学品经营许可证（带存储）